Cancel all running tasks when shutting down the worker.
Cancel all running tasks when shutting down the worker.

learningequality/kolibri,indirectlylit/kolibri,indirectlylit/kolibri,mrpau/kolibri,learningequality/kolibri,mrpau/kolibri,indirectlylit/kolibri,learningequality/kolibri,mrpau/kolibri,learningequality/kolibri,mrpau/kolibri,indirectlylit/kolibri